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Enable a service and start it immediately

caution rootsystemddebian, ubuntu

Caution: This command changes the system. Understand what it does before you run it.

Adjust the values, the command updates live
root@server
systemctl enable --now fail2ban

enable creates the links so the service starts at every boot, and --now additionally starts it right away. systemctl is-enabled and systemctl is-active with the unit name show whether it worked. Fixes the typical case where a service is no longer running after a reboot.

Also searched as

  • start service at boot
  • enable autostart for a service
  • systemctl enable and start
  • service does not start after reboot

Related one-liners

All in systemd

List all services enabled at boot

$systemctl list-unit-files --type=service --state=enabled --no-pager
harmlesssystemd

Stop a service and disable autostart

#systemctl disable --now cups
cautionsystemd

Change service settings with an override

#systemctl edit mariadb
cautionsystemd

List all running systemd services

$systemctl list-units --type=service --state=running --no-pager
harmlesssystemd

Query uptime, memory and restart count of a service

$systemctl show php8.2-fpm -p ActiveState,ActiveEnterTimestamp,MainPID,MemoryCurrent,NRestarts
harmlesssystemd

Restart a service and check the result

#systemctl restart php8.2-fpm && systemctl is-active php8.2-fpm
cautionsystemd

Read first, then run.

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